diff --git a/manual/using.html b/manual/using.html
index 69483a6fc..836296586 100644
--- a/manual/using.html
+++ b/manual/using.html
@@ -61,7 +61,10 @@ to be unique. (For additional information, see the
the "basedir"
property beforehand. When this is done, it must be omitted in the
project tag. If neither the attribute nor the property have
- been set, the parent directory of the buildfile will be used.
+ been set, the parent directory of the buildfile will be used.
+ A relative path is resolved relative to the directory containing
+ the build file.
+